MIL-DTL-55668 Cord, Electrical; Audio, Subminiature \(Retractile And Straight\)This specification covers subminiature audio helical retractile cords and straight cords with either stranded wire or tinsel wire conductors, for accessories associated in for the use with microphone, telephone, switchboard, and associated communication equipment. These cords are intended for operations at audio frequencies and temperatures from -55 Degrees C to +85 Degrees C with a high degree of flexibility. Each retractile cord is designed for extension in normal service up to 6 times its nominal retracted helical length.

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MIL-DTL-55668D

6.9 Tin whisker growth. The use of alloys with tin content greater than 97 percent, by mass, may exhibit

tin whisker growth problems after manufacture. Tin whiskers may occur anytime from a day to years after

manufacture and can develop under typical operating conditions, on products that use such materials.

Conformal coatings applied over top of a whisker-prone surface will not prevent the formation of tin

whiskers. Alloys of 3 percent lead, by mass, have shown to inhibit the growth of tin whiskers. For

additional information on this matter, refer to ASTM-B545 (Standard Specification for Electrodeposited

Coatings of Tin).

6.10 Environmentally preferable material. Environmentally preferable materials should be used to the

maximum extent possible to meet the requirements of this specification. As of the dating of this

document, the U.S. Environmental Protection Agency (EPA) is focusing efforts on reducing 31 priority

chemicals. The list of chemicals and additional information is available on their website

eliminated unless needed to meet the requirements specified herein (see section 3).

6.11 Changes from previous issue. The margins of this specification are marked with vertical lines to

indicate where changes from the previous issue were made. This was done as a convenience only and

the Government assumes no liability whatsoever for any inaccuracies in these notations. Bidders and

contractors are cautioned to evaluate the requirements of this document based on the entire content

irrespective of the marginal notations and relationship to the last previous issue.

CONCLUDING MATERIAL

Custodians:

Preparing activity:

Army � CR

DLA - CC

(Project 6145-2008-126)

NOTE: The activities listed above were interested in this document as of the date of this document.

Since organization and responsibilities can change, please verify the currency of the information above

using the ASSIST Online database at https://assist.daps.dla.mil.